State Rep. Sandy Adams leads the GOP primary in Florida's 24th Congressional District by the slimmest of margins and is the likely winner, although the race has not been officially called.
The winner will face Rep. Suzanne Kosmas (D-Fla.) in November.
Adams leads by just over 500 votes with 99 percent of precincts reporting. She has 30 percent of the vote to Karen Diebel's 29 percent.
The National Republican Congressional Committee (NRCC) is already touting Adams as the victor, calling her "a reliable fiscal conservative and expert on law enforcement issues" in an e-mail.
The primary was a nasty affair that featured frequent attacks and accusations of mental instability against one of the leading candidates. Businessman Craig Miller and Winter Park City Commissioner Karen Diebel sparred throughout the race.
Diebel had the backing of former Arkansas Gov. Mike Huckabee, but Miller, the former CEO of Ruth's Chris Steak House, poured plenty of his own money into the race.
In the final days before Tuesday's primary, Miller unleashed a mailer that attacked Diebel as "unstable," citing a call to police to report a snake in her pool. Diebel reportedly suggested it might have been placed there by political opponents.
The battle between Diebel and Miller appears to have created the opening for Adams, who ran largely on her support for an Arizona-style immigration law for Florida.
Republicans are convinced Kosmas is vulnerable given her vote in favor of the healthcare reform bill, and the NRCC is already tying her to House Speaker Nancy Pelosi (D-Calif.).